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P0733-GEAR RATIO ERROR IN 3RD (CONTINUED) Diagnostic Test 1. DETERMINING IF RELATED DTC’S ARE PRESENT With the scan tool, check for other transmission DTC’s Are there any Transmission; solenoid, line pressure, speed sensor, and/or loss of prime DTC’s present? Yes >> Refer to appropriate symptom in the Transmission category. Perform the test for P0944–LOSS OF PRIME first if it is present. Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1. No >> Go To 2 2. CHECK EATX DTC EVENT DATA With the scan tool, read and record the EATX DTC EVENT DATA. NOTE: Make sure to record all EATX DTC EVENT DATA stored in the scan tool for future reference in this Does the EATX DTC EVENT DATA display information for the DTC P0733? Yes >> Go To 4 No >> Go To 3 3. TARGET GEAR IN EATX DTC EVENT DATA In the EATX DTC EVENT DATA, identify the DTC that was recorded earlier. Does the EATX DTC EVENT DATA display information for the DTC P1790, with target gear = 3rd, or with Yes >> Go To 4 No >> Go To 7 4. CHECK RPM IN EATX DTC EVENT DATA Refer to the EATX DTC EVENT DATA recorded earlier. Does the Input RPM read zero? Yes >> Check the input speed sensor and wiring. Refer to test P0715 and diagnose as if the DTC is current. Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1. No >> Go To 5 5. CHECK LINE PRESSURE READING Refer to the EATX DTC EVENT DATA recorded earlier. Is the line pressure reading more than 10 psi below the desired line pressure? Yes >> Go To 6 No >> Go To 7 21 - 86 AUTOMATIC TRANSMISSION 545RFE - ELECTRICAL DIAGNOSTICS WK |